package com.mmall.service.impl;

import com.mmall.common.Const;
import com.mmall.common.ServerResponse;
import com.mmall.common.TokenCache;
import com.mmall.dao.UserMapper;
import com.mmall.pojo.User;
import com.mmall.service.IUserService;
import com.mmall.util.MD5Util;
import com.mmall.util.RedisShardedPoolUtil;
import net.sf.jsqlparser.schema.Server;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.print.attribute.standard.Severity;
import java.util.UUID;

/**
 * @author sunqy
 * @create 2019/6/15
 */
@Service("iUserService")
public class UserServiceImpl implements IUserService {

    @Autowired
    private UserMapper userMapper;

    /**
     * 登录
     * @param username
     * @param password
     * @return
     */
    @Override
    public ServerResponse<User> login(String username, String password) {
        int resultCount = userMapper.checkUsername(username);
        if(resultCount == 0){
            return ServerResponse.createByErrorMessage("用户名不存在");
        }
        String md5Password = MD5Util.MD5EncodeUtf8(password);
        User user = userMapper.selectLogin(username, md5Password);
        if(user== null){
            return ServerResponse.createByErrorMessage("密码错误");
        }
        user.setPassword(StringUtils.EMPTY);
        return ServerResponse.createBySuccess("登录成功",user);
    }

    /**
     * 注册
     * @param user
     * @return
     */
    @Override
    public ServerResponse<String> register(User user){
        ServerResponse validRespnse = this.checkValid(user.getUsername(),Const.USERNAME);
        if(!validRespnse.isSuccess()){
            return validRespnse;
        }
        validRespnse = this.checkValid(user.getEmail(),Const.EMAIL);
        if(!validRespnse.isSuccess()){
            return validRespnse;
        }

        user.setRole(Const.Role.ROLE_CUSTOMER);
        //MD5加密
        user.setPassword(MD5Util.MD5EncodeUtf8(user.getPassword()));

        int resultCount = userMapper.insert(user);
        if(resultCount == 0){
            return ServerResponse.createByErrorMessage("注册失败");
        }
        return ServerResponse.createBySuccessMessage("注册成功");
    }

    /**
     * 校验用户名和Email是否已经注册
     * @param str
     * @param type
     * @return
     */
    @Override
    public ServerResponse<String> checkValid(String str, String type){

        if(StringUtils.isNotBlank(type)){
            //开始校验
            if(Const.USERNAME.equals(type)){
                int resultCount = userMapper.checkUsername(str);
                if(resultCount > 0){
                    return ServerResponse.createByErrorMessage("用户名已存在");
                }
            }
            if(Const.EMAIL.equals(type)){
                int resultCount = userMapper.checkEmail(str);
                if(resultCount > 0){
                    return ServerResponse.createByErrorMessage("email已存在");
                }
            }
        }else {
            return ServerResponse.createByErrorMessage("参数错误");
        }
        return ServerResponse.createBySuccessMessage("校验成功");
    }

    /**
     * 忘记密码时查询密码提示问题
     * @param username
     * @return
     */
    public ServerResponse selectQuestion(String username){
        ServerResponse validResponse = this.checkValid(username,Const.USERNAME);
        if(validResponse.isSuccess()){
            return ServerResponse.createByErrorMessage("用户不存在");
        }
        String question = userMapper.selectQuestionByUsername(username);
        if(StringUtils.isNotBlank(question)){
            return ServerResponse.createBySuccess(question);
        }
        return ServerResponse.createByErrorMessage("找回密码的问题是空的");
    }

    /**
     * 忘记密码时校验密码提示问题和答案
     * @param username
     * @param question
     * @param answer
     * @return
     */
    public ServerResponse<String> checkAnswer(String username, String question, String answer){
        int resultCount = userMapper.checkAnswer(username, question, answer);
        if(resultCount>0){
            String forgetToken = UUID.randomUUID().toString();
//            TokenCache.setKey(TokenCache.TOKEN_PREFIX+username,forgetToken);
            RedisShardedPoolUtil.setex(TokenCache.TOKEN_PREFIX+username,forgetToken,60*60*12);
            return ServerResponse.createBySuccess(forgetToken);
        }
        return ServerResponse.createByErrorMessage("问题的答案错误");
    }

    /**
     * 修改密码
     * @param username
     * @param passwordNew
     * @param forgetToken
     * @return
     */
    public ServerResponse<String> forgetResetPassword(String username, String passwordNew, String forgetToken){
        if(StringUtils.isBlank(forgetToken)){
            return ServerResponse.createByErrorMessage("参数错误，token需要传递");
        }
        ServerResponse validResponse = this.checkValid(username,Const.USERNAME);
        if(validResponse.isSuccess()){
            return ServerResponse.createByErrorMessage("用户不存在");
        }
//         String token = TokenCache.getKey(TokenCache.TOKEN_PREFIX+username);
        String token = RedisShardedPoolUtil.get(TokenCache.TOKEN_PREFIX+username);
        if(StringUtils.isBlank(token)){
            return ServerResponse.createByErrorMessage("token无效或者过期");
        }
        if(StringUtils.equals(forgetToken, token)){
            String md5Password = MD5Util.MD5EncodeUtf8(passwordNew);
            int rowCount = userMapper.updatePasswordByUsername(username, md5Password);
            if(rowCount>0){
                return ServerResponse.createBySuccessMessage("修改密码成功");
            }
        }else {
            return ServerResponse.createBySuccessMessage("token错误，请重新获取重置密码的token");
        }
        return ServerResponse.createByErrorMessage("修改密码失败");
    }


    /**
     * 登录状态下修改密码
     * @param passwordOld
     * @param passwordNew
     * @param user
     * @return
     */
    public ServerResponse<String> resetPassword(String passwordOld, String passwordNew, User user){
        //防止横向越权，要检查一下用户的旧密码
        int resultCount = userMapper.checkPassword(MD5Util.MD5EncodeUtf8(passwordOld),user.getId());
        if(resultCount == 0){
            return ServerResponse.createByErrorMessage("旧密码错误");
        }
        user.setPassword(MD5Util.MD5EncodeUtf8(passwordNew));
        int updateCount = userMapper.updateByPrimaryKeySelective(user);
        if(updateCount > 0){
            return ServerResponse.createBySuccessMessage("密码更新成功");
        }
        return ServerResponse.createByErrorMessage("密码更新失败");
    }


    /**
     * 更新用户信息
     * @param user
     * @return
     */
    public ServerResponse<User> updateUserInfo(User user){
        int resultCount = userMapper.checkEmailByUserId(user.getEmail(), user.getId());
        if(resultCount>0){
            return ServerResponse.createByErrorMessage("该email已经注册，请更换email，再尝试更新！");
        }
        User updateUser = new User();
        updateUser.setId(user.getId());
        updateUser.setEmail(user.getEmail());
        updateUser.setPhone(user.getPhone());
        updateUser.setQuestion(user.getQuestion());
        updateUser.setAnswer(user.getAnswer());

        int updateCount = userMapper.updateByPrimaryKeySelective(updateUser);
        if(updateCount > 0){
            return ServerResponse.createBySuccess("更新个人信息成功",updateUser);
        }
        return ServerResponse.createByErrorMessage("更新个人信息失败");
    }


    /**
     * 登录状态下获取用户信息
     * @param userid
     * @return
     */
    public ServerResponse<User> getInformation(Integer userid){
        User user = userMapper.selectByPrimaryKey(userid);
        if(user == null){
            return ServerResponse.createByErrorMessage("找不到当前用户");
        }
        user.setPassword(StringUtils.EMPTY);
        return ServerResponse.createBySuccess(user);
    }


    //backend后台管理


    /**
     * 校验当前用户是否是管理员
     * @param user
     * @return
     */
    public ServerResponse checkAdminRole(User user){
        if(user != null && user.getRole().intValue() == Const.Role.ROLE_ADMIN){
            return ServerResponse.createBySuccess();
        }
        return ServerResponse.createByError();
    }
}
